Air Velocity Calculator

Formula

To calculate the air velocity (V_air):

\[ V_{air} = \frac{AFR}{DA} \]

Where:

\( V_{air} \) is the air velocity (ft/s)
\( AFR \) is the air flow rate (ft³/s)
\( DA \) is the duct area (ft²)

What is Air Velocity?

Air velocity describes the linear speed at which air flows through an enclosed duct. It is a crucial parameter in HVAC systems, ventilation systems, and other applications involving air flow. The air velocity can impact the efficiency of air distribution and comfort in a space. Accurate calculation of air velocity is essential for proper system design and performance optimization.

Example Calculation

Let's assume the following values:

Air Flow Rate (AFR) = 500 ft³/s
Duct Area (DA) = 10 ft²

Using the formula:

\[ V_{air} = \frac{500}{10} = 50 \text{ ft/s} \]

The air velocity (V_air) is 50 ft/s.